Supporting foot for adding machines



S'ept. 5, 1939. w. A. ANDERSON SUPPORTING FOOT FOR ADDING MACHINES Filed June 25, 1937 G nummuf mumllli.,

INVENTOR WALTER A. ANDERSON El# m% IIW ATTORNEY Patented Sept. 5, 1939.

UNITEDv sTATEs PATENT OFFICE SUPPORTING FOOT FOR ADDING MACHINES Application June 25, 1937, Serial No. 150,365

' 4 Claims.

This invention relates to adding machines, and more particularly to the supporting feet thereof.

Adding machinesof the portable type are generally providedl with four legs having fairly rigid 5 but slightly resilient rubber inserts thereon, the purpose of which are to lessen the noise incident to operation of the machine. This noise is amplied to a considerable degree when the adding machine issupported on a desk or cabinet, the I supporting structure acting as a sound board. It is accordingly an object of the present invention to provide, for the. machine, a 'more pliant and yielding mounting, having resiliency superior to the rubber feet now being used, whereby shocks l caused` by the abrupt starting and stopping of the 'machine and. the other noises incident to its operation may be readily absorbed.

Another object of the invention is to provide a device of this character which is comprised of few parts, adapted to be easily assembled and inexpensive to manufacture.

With these objects in view, the invention consists in certain novel features of construction and .combinations of parts, the essential elements of which are set forth in appended claims, and

several embodiments of which are hereinafter described with reference to the accompanying drawing which form a part of the specification. In the drawing: i

Figure 1 is a side elevation of an adding machine` with the preferred form of -the improved .mounting secured thereon,

Figure 2'is a detail sectional view of this preferred form,

Figure 8 is a top plan View thereof, Figure 4 is a detail sectional view of a modified form of the invention,

.Figure 5 is a similar view of another-modified form of the invention,

Figure 6 is a sectional View of still another modied form of the invention, and

Figure 'I is a bottom p'lan'view of Figure 6. The reference numeral I indicates the base of the adding machine, the four corners of which are provided with downwardly projecting bosses 2. Each of the bosses 2 are threaded to receive shouldered screws 3. The screws 3 (Figures 2 and `3) pass upwardly through openings in metal capped rubber feet 4. These openings are large enough to permit relative sliding movement between the screws and feet. A flat spring 5 of substantially U-shaped contour is interposed between the foot 4 and the base I and is held securely by virtue of a shoulder 8 on screw 3 engaging the upper blade of the spring, the aperture in the upp'er blade fitting neatly around the threaded portion of the screw. The diameter of the aperture in the lower blade of spring 3, through which the shouldered portion of the screw 3 extends, is large enough `to allow relative 5 vertical movement between the lower blade and the screw. During the machine operations, springs4 5 coupled with the rubber feet 4 serve to dampen the vibrations created by operation of the machine.

In the modified form illustrated in Figure 4 the rubber foot 4 is encased in a drawn metal shell 1 having an upwardly extending sleeve 8 slidably embracing the boss 2. A coiled compressible spring 9 encircling the sleeve 8 extends 15 between the bottom of the base I and an annular groove provided in the shell 1 adjacent the sleeve 8. A shouldered screw 3 retains these parts in their assembled relation.

Figure 5 shows a modied form comprising a 20 rubber foot I0 moulded on-or otherwise suitably secured to a flange I I of a cylindrical metal sleeve I2. A rubber sleeve I3, preferably of high resilient qualities is moulded around the metal sleeve I2 and in turn to another metal sleeve I4, which 25 encircles said rubber sleeve. The sleeve I4 is of such diameter as to fit snugly within an inverted metal cup I5 rigidly secured to the boss 2 by a screw I8. In this form of the device the rubber sleeve I3 serves the purpose of the spring 5fin 30 the preferred embodiment, sleeve I3 yieldingly absorbing the shock.

The fourth modification, shown in Figures 6 and 7, comprises a circular ruber foot II having suitable spaced openings adapted to; embrace headed 35 studs I8 riveted in the bottom of a drawn metal shell I9. The shell I9 is slidably mounted over an inverted metal cup 20. A at spirally coiled spring 2| is positioned between the cup 20 and shell I 9. A shouldered screw 22 rigidly secures '40 A the assembled parts t the boss.2 of the base I.

While the forms of the device herein shown and described are admirably adapted to fulfill the object primarily stated, it is to be understood that it is not intended to confine the invention to the 45 forms of embodiment herein disclosed other than bythe appending claims. v

What is claimed is:

1. In a machine of the class described, a supporting base, a supporting'structure therefor in- 50 cluding a'resilient foot having an aperture therein, an apertured metal cap thereon, a shouldered screw extending'loosely through the foot and cap,

a substantially U-shaped spring interposed between the metal cap and the supporting base, 55

apertures near both ends of the U-shaped spring,v the aperture of. the upper portion being of a diameter to t neatly over the threaded portion of the screw and the aperture of the lower portion being of a diameter to permit clearance between the shouldered portion of the screw and the lower portion of the spring, said screw extending loosely through the apertures of the spring and being secured to the supporting base.

2. In a machine of the class described, a supporting base, a. supporting structure therefor in cluding a resilient foot having an aperture therein, an apertured metal cap thereon, a substantially U-shaped spring interposed between the metal cap and the 'supporting base and bearing freely on the cap, and a member extending loosely through the foot, cap and spring, and being secured to the supporting base.

3. In a. machine of the class described, a supporting base, a supporting structure therefor including a resilient foot having a shouldered aperture therein, an apertured metal cap thereon, a

substantially U-shaped spring interposed between the metal cap and the supporting base,y and a headed member extending loosely through the foot, cap 'and spring, and being secured to the supporting base, the head of the member lying adjacent the shoulder of the aperture in the foot to hold the parts in assembled relation when the machine is lifted.

4. In a machine of the class described, a supporting base, a supporting structure therefor including a resilient foot having an aperture therein, an apertured metal cap thereon, a substantially U-shaped spring having an aperture and a boss near one end and being interposed between the metal cap and the supporting base, the boss lying against the metal cap and being of sufcient size to prevent contact of the cap with other parts of the spring, and a member extending loosely through the foot, cap 'and spring, andbeing secured to the supporting base.

AWALTER. A. ANDERSON. 

